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Lateinischer name
Allgemeiner name
Familie
 
     
Penstemon rattanii Gray var. rattanii Gray [superfluous autonym]
>>Penstemon rattanii
Scrophulariaceae
Penstemon retrorsus Payson ex Pennell
Adobe Hills beardtongue
Scrophulariaceae
Penstemon rhizomatosus N. Holmgren
Scheel Creek beardtongue
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl.
cutleaf beardtongue
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl. ssp. curtiflorus Keck
>>Penstemon richardsonii var. curtiflorus
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl. ssp. dentatus Keck
>>Penstemon richardsonii var. dentatus
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl. var. curtiflorus (Keck) Cronq.
cutleaf beardtongue
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl. var. dentatus (Keck) Cronq.
cutleaf beardtongue
Scrophulariaceae
Penstemon richardsonii Dougl. ex Lindl. var. richardsonii
Richardson s penstemon
Scrophulariaceae
Penstemon roezlii Regel
Roezl s penstemon
Scrophulariaceae
Penstemon rostriflorus Kellogg
Bridge penstemon
Scrophulariaceae
Penstemon rothrockii Gray
>>Keckiella rothrockii ssp. rothrockii
Scrophulariaceae
Penstemon rothrockii Gray ssp. jacintensis (Abrams) Keck
>>Keckiella rothrockii ssp. jacintensis
Scrophulariaceae
Penstemon rubicundus Keck
Wassuk Range beardtongue
Scrophulariaceae
Penstemon rupicola (Piper) T.J. Howell
cliff beardtongue
Scrophulariaceae
Penstemon rydbergii A. Nels.
Rydberg s penstemon
Scrophulariaceae
Penstemon rydbergii A. Nels. ssp. aggregatus (Pennell) Keck
>>Penstemon rydbergii var. aggregatus
Scrophulariaceae
Penstemon rydbergii A. Nels. var. aggregatus (Pennell) N. Holmgren
meadow beardtongue
Scrophulariaceae
Penstemon rydbergii A. Nels. var. oreocharis (Greene) N. Holmgren
herbaceous penstemon
Scrophulariaceae
Penstemon rydbergii A. Nels. var. rydbergii
swollen penstemon
Scrophulariaceae
Penstemon rydbergii A. Nels. var. varians (A. Nels.) Cronq.
>>Penstemon rydbergii var. rydbergii
Scrophulariaceae
Penstemon saxosorum Pennell
upland beardtongue
Scrophulariaceae
Penstemon scapoides Keck
pinyon beardtongue
Scrophulariaceae
Penstemon scariosus Pennell
White River beardtongue
Scrophulariaceae
Penstemon scariosus Pennell var. albifluvis (England) N. Holmgren
White River beardtongue
Scrophulariaceae
Penstemon scariosus Pennell var. cyanomontanus Neese
Neese s Blue Mountain beardtongue
Scrophulariaceae
Penstemon scariosus Pennell var. garrettii (Pennell) N. Holmgren
Garrett s beardtongue
Scrophulariaceae
Penstemon scariosus Pennell var. scariosus
White River beardtongue
Scrophulariaceae
Penstemon Schmidel
beardtongue
Scrophulariaceae
Penstemon scouleri Lindl.
>>Penstemon fruticosus var. scouleri
Scrophulariaceae
Penstemon secundiflorus Benth.
sidebells penstemon
Scrophulariaceae
Penstemon seorsus (A. Nels.) Keck
shortlobe penstemon
Scrophulariaceae
Penstemon sepalulus A. Nels.
littlecup beardtongue
Scrophulariaceae
Penstemon serrulatus Menzies ex Sm.
serrulate penstemon
Scrophulariaceae
Penstemon shastensis Keck
>>Penstemon heterodoxus var. shastensis
Scrophulariaceae
Penstemon smallii Heller
Small s beardtongue
Scrophulariaceae
Penstemon spatulatus Pennell
Wallowa beardtongue
Scrophulariaceae
Penstemon speciosus Dougl. ex Lindl.
royal penstemon
Scrophulariaceae
Penstemon speciosus Dougl. ex Lindl. ssp. kennedyi (A. Nels.) Keck
>>Penstemon speciosus
Scrophulariaceae
Penstemon speciosus Dougl. ex Lindl. ssp. lemhiensis Keck
>>Penstemon lemhiensis
Scrophulariaceae
Penstemon spectabilis Thurb. ex Gray
showy penstemon
Scrophulariaceae
Penstemon spectabilis Thurb. ex Gray ssp. spectabilis
showy penstemon
Scrophulariaceae
Penstemon spectabilis Thurb. ex Gray ssp. subviscosus Keck
showy penstemon
Scrophulariaceae
Penstemon spectabilis Thurb. ex Gray var. subviscosus (Keck) McMinn
>>Penstemon spectabilis ssp. subviscosus
Scrophulariaceae
Penstemon spectabilis Thurb. var. spectabilis Thurb. [superfluous autonym]
>>Penstemon spectabilis
Scrophulariaceae
Penstemon spinulosus Woot. & Standl.
>>Penstemon heterophyllus ssp. purdyi
Scrophulariaceae
Penstemon stenophyllus (Gray) T.J. Howell
Sonoran beardtongue
Scrophulariaceae
Penstemon stephensii Brandeg.
Stephens penstemon
Scrophulariaceae
Penstemon strictiformis Rydb.
Mancos penstemon
Scrophulariaceae
Penstemon strictus Benth.
Rocky Mountain penstemon
Scrophulariaceae
Penstemon strictus Benth. ssp. angustus Pennell
>>Penstemon strictus
Scrophulariaceae
Penstemon strictus Benth. ssp. strictiformis (Rydb.) Keck
>>Penstemon strictiformis
Scrophulariaceae
Penstemon subglaber Rydb.
smooth penstemon
Scrophulariaceae
Penstemon subserratus Pennell
finetooth beardtongue
Scrophulariaceae
Penstemon subulatus M.E. Jones
hackberry beardtongue
Scrophulariaceae
Penstemon sudans M.E. Jones
Susanville beardtongue
Scrophulariaceae
Penstemon suffrutescens Rydb.
>>Penstemon crandallii ssp. crandallii
Scrophulariaceae
Penstemon superbus A. Nels.
superb beardtongue
Scrophulariaceae
Penstemon tenuiflorus Pennell
eastern whiteflower beardtongue
Scrophulariaceae
Penstemon tenuis Small
sharpsepal beardtongue
Scrophulariaceae
Penstemon ternatus Torr. ex Gray
>>Keckiella ternata ssp. ternata
Scrophulariaceae
Penstemon ternatus Torr. ex Gray ssp. septentrionalis (Munz & Johnston) Keck
>>Keckiella ternata ssp. septentrionalis
Scrophulariaceae
Penstemon teucrioides Greene
germander beardtongue
Scrophulariaceae
Penstemon thompsoniae (Gray) Rydb.
Thompson s beardtongue
Scrophulariaceae
Penstemon thompsoniae (Gray) Rydb. ssp. jaegeri Keck
Jaeger s beardtongue
Scrophulariaceae
Penstemon thompsoniae (Gray) Rydb. ssp. thompsoniae
Thompson s beardtongue
Scrophulariaceae
Penstemon thompsoniae (Gray) Rydb. var. desperatus Neese
>>Penstemon thompsoniae ssp. thompsoniae
Scrophulariaceae
Penstemon thurberi Torr.
Thurber s penstemon
Scrophulariaceae
Penstemon thurberi Torr. var. anestius Reveal & Beatley
>>Penstemon thurberi
Scrophulariaceae
Penstemon tidestromii Pennell
Tidestrom s beardtongue
Scrophulariaceae
Penstemon tiehmii N. Holmgren
Tiehm s beardtongue
Scrophulariaceae
Penstemon tolmiei Hook.
>>Penstemon procerus var. tolmiei
Scrophulariaceae
Penstemon tolmiei Hook. ssp. brachyanthus (Pennell) Keck
>>Penstemon procerus var. brachyanthus
Scrophulariaceae
Penstemon tolmiei Hook. ssp. formosus (A. Nels.) Keck
>>Penstemon procerus var. formosus
Scrophulariaceae
Penstemon torreyi Benth.
>>Penstemon barbatus ssp. torreyi
Scrophulariaceae

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